1  /* { dg-do compile } */
       2  /* { dg-options "-mint-register=3 -msave-acc-in-interrupts" } */
       3  
       4  /* Verify that the RX specific function attributes work.  */
       5  
       6  void fast_interrupt (void) __attribute__((__fast_interrupt__));
       7  void interrupt (void) __attribute__((__interrupt__));
       8  int naked (int) __attribute__((__naked__));
       9  
      10  int flag = 0;
      11  
      12  /* Fast interrupt handler.  Only uses registers marked as fixed
      13     by the -fixed-xxx gcc command line option.  Returns via RTFI.  */
      14  
      15  void
      16  fast_interrupt (void)
      17  {
      18    flag = 1;
      19  }
      20  
      21  /* Interrupt handler.  Must preserve any register it uses, even
      22     call clobbered ones.  Returns via RTE.  */
      23  
      24  void
      25  interrupt (void)
      26  {
      27    switch (flag)
      28      {
      29      case 0:
      30        flag = -1;
      31        break;
      32      case 1:
      33      case 2:
      34      case 4:
      35        flag = flag - 2;
      36        break;
      37      case 5:
      38      case 7:
      39      case 6:
      40        flag ^= 3;
      41        break;
      42      default:
      43        naked (flag * 2);
      44        break;
      45      }
      46  }
      47  
      48  /* Naked function.  The programmer must supply the function's
      49     prologue and epilogue instructions.  */
      50  
      51  int
      52  naked (int arg)
      53  {
      54    flag = arg;
      55  }
      56  
      57  /* { dg-final { scan-assembler "rtfi" } } */
      58  /* { dg-final { scan-assembler "rte" } } */